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November 14, 2012
Casey Christie photo

FILE - In this Tuesday, Aug. 21, 2007 file photo, the sun sets behind an oil refinery on Rosedale Highway, in Bakersfield, Calif. On Wednesday, Nov. 14, 2012, California�s largest greenhouse gas emitters will for the first time begin buying permits in a landmark �cap-and-trade� system meant to control emissions of heat-trapping gases and spur investment in clean technologies. The program is a key part of California�s 2006 climate-change law, AB32, a suite of regulations that dictate standards for cleaner-burning fuels, more efficient automobiles and increased use of renewable energy.